PF_RT_PRIO
snl_add_msg_attr_u8(nw, PF_RT_PRIO, r->prio);
{ .type = PF_RT_PRIO, .off = _OUT(r.prio), .cb = snl_attr_get_uint8 },
nlattr_add_u8(nw, PF_RT_PRIO, rule->prio);
{ .type = PF_RT_PRIO, .off = _OUT(prio), .cb = nlattr_get_uint8 },